iMtG Server: Gathering

Dark Burn 75 cards, 15 sideboard 4 {Rakdos Guildgate} 6 {Mountain} 4 {Blackcleave Cliffs} 4 {Dragonskull Summit} 4 {Blood Crypt} 22 lands 4 {Deathrite Shaman} 4 {Goblin Guide} 4 {Ash Zealot} 12 creatures 3 {Phyrexian Arena} 3 {Volcanic Fallout} 4 {Lava Spike} 4 {Searing Blaze} 4 {Rift Bolt} 4 {Lightning Bolt} 4 {Bump in the Night} 26 other spells Sideboard 3 {Ensnaring Bridge} 2 {Shattering Spree} 4 {Inquisition of Kozilek} 4 {Rakdos Charm} 2 {Torpor Orb} 15 sideboard cards

Looks pretty strong. {Goblin Guide} will do some work. It may not carry you to victory at the GP as without fetches you can easily top deck land late game, so watch out for that.